Abstract
Single complex fluorescence polarization spectroscopy is applied to study the peripheral light harvesting antenna (LH2) from photosynthetic purple bacterium Rhodopseudomonas (Rps.) acidophila. The measured two-dimensional excitation-emission polarization plots are used to construct geometric representation for the absorbing B800 and emitting B850 as ellipses. The shape and orientation of the ellipses is discussed in terms of tilted LH2 complexes where emission occurs from energetically disordered B850 excitons.
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Acknowledgments
We thank Yuxi Tian for valuable discussions. This study was financially supported by the Swedish Research Council, KAW foundation and STEM. ST is indebted to Swedish Institute and Higher Education Commission of Pakistan for financial assistance.
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Tubasum, S., Thomsson, D., Cogdell, R. et al. Polarization single complex imaging of circular photosynthetic antenna. Photosynth Res 111, 41–45 (2012). https://doi.org/10.1007/s11120-011-9676-7
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DOI: https://doi.org/10.1007/s11120-011-9676-7